| X12 947 Warehouse Inventory Adjustment AdviceListed on 1 channel: Wayfair | warehouse inventory adjustment adjustment, item, location and reason | - Test a negative adjustment without converting it into a positive stock receipt.
- Preserve adjustment reasons and prevent a duplicate message from moving stock twice.
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| X12 310 Freight Receipt And Invoice OceanListed on 1 channel: Wayfair | ocean-freight payable carrier invoice, bill of lading and container references | - Reconcile charges for multiple containers to the bill total.
- Distinguish an additional charge from a replacement invoice for the same voyage.
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| X12 856 Ship Notice ManifestListed on 1 channel: Wayfair | shipment notice (ASN) shipment, order, package and item references | - Reconcile item quantities through shipment, order and packaging levels against the physical shipment.
- Test split shipments for one purchase order and prevent the second ASN from replacing the first.
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| X12 865 Purchase Order Change Acknowledgment Request Seller InitiatedListed on 1 channel: Wayfair | seller order-change response or request original purchase order, change reference and affected line | - Distinguish a seller-proposed change from acceptance of a buyer-requested change.
- Reject an outdated revision that would overwrite a later agreed quantity.
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| X12 850 Purchase OrderListed on 1 channel: Wayfair | purchase order or sales order buyer purchase order, order line and trading-party identifiers | - Map buyer item numbers to seller SKUs and explicitly convert case quantities to the agreed unit.
- Resend one purchase order and confirm that only one sales order is created.
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| X12 860 Purchase Order Change Request Buyer InitiatedListed on 1 channel: Wayfair | buyer order-change request original purchase order, change revision and affected line | - Apply a quantity reduction to the existing order instead of creating another order.
- Test a cancellation arriving after allocation or shipment and route it to an exception owner.
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| X12 846 Inventory Inquiry AdviceListed on 1 channel: Wayfair | inventory availability record item, location, quantity type and snapshot time | - Distinguish on-hand, available and reserved quantities before publishing availability.
- Deliver an old snapshot after a new one and prevent stale stock from replacing current values.
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| X12 810 InvoiceListed on 1 channel: Wayfair | accounts-receivable or accounts-payable invoice invoice number, purchase order and invoice line | - Reconcile line amounts, allowances, charges and tax to the invoice total.
- Submit the same invoice twice and verify that it cannot create a second payable.
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| X12 855 Purchase Order AcknowledgmentListed on 1 channel: Wayfair | purchase-order response original purchase order, response revision and order line | - Test a partially accepted order with a backordered line and retain both outcomes.
- Do not treat a syntax acknowledgment as acceptance of price, quantity or delivery dates.
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